import java.util.Arrays;

public class java {
    public static void main(String[] args) {
        int[][] array = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};

        //遍历二维数组
        System.out.println(Arrays.deepToString(array));
    }
}
